first off, thanks for those that take the time to read this and reply.
Im the owner (not builder ) of a 91 S-10 blazer that was converted from a 4.3L to a 5.7L 350 engine. Im pulling the pan tomorrow to change out the oil pump to a high volume one because the oil pressure at startup is about 20-35 lbs at idle and drops to about 10lbs after warm. 2k rpm is about 25 lbs pressure again. This is going to be an all day job because of all the stuff in the way of getting the pan down.
Ok, can someone please tell me whats going on here. I rev up the engine, and then right when i let off the accellerator the oil pressure will jump up about 5 pounds. any clues to whats causing this?
THanks Again -Eric White